WO2001048753A1 - Disque optique reinscriptible a changement de phase dote partiellement d'une region rom et procedes d'enregistrement et d'effacement de donnees pour disques optiques - Google Patents

Disque optique reinscriptible a changement de phase dote partiellement d'une region rom et procedes d'enregistrement et d'effacement de donnees pour disques optiques Download PDF

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Publication number
WO2001048753A1
WO2001048753A1 PCT/JP2000/009016 JP0009016W WO0148753A1 WO 2001048753 A1 WO2001048753 A1 WO 2001048753A1 JP 0009016 W JP0009016 W JP 0009016W WO 0148753 A1 WO0148753 A1 WO 0148753A1
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WO
WIPO (PCT)
Prior art keywords
area
data
read
rewritable
session
Prior art date
Application number
PCT/JP2000/009016
Other languages
English (en)
Japanese (ja)
Inventor
Michikazu Horie
Original Assignee
Mitsubishi Chemical Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Chemical Corporation filed Critical Mitsubishi Chemical Corporation
Priority to AU22212/01A priority Critical patent/AU2221201A/en
Priority to EP00985792A priority patent/EP1168322A4/fr
Publication of WO2001048753A1 publication Critical patent/WO2001048753A1/fr
Priority to US09/942,277 priority patent/US6671249B2/en
Priority to US09/952,509 priority patent/US20020019948A1/en
Priority to US10/686,760 priority patent/US7092335B2/en
Priority to US11/397,188 priority patent/US7664000B2/en

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Classifications

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    • G06—COMPUTING; CALCULATING OR COUNTING
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Definitions

  • Rewritable phase-change optical disk partially provided with ROM area, and light
  • the present invention relates to a rewritable phase-change optical disk in which a ROM area is partially provided, and a system for rewriting a RAM section without erroneously overwriting ROM data on the disk.
  • it relates to rewritable compact discs with embedded ROMZRAM.
  • CD-format read-only disc CD_ROM
  • CD_R recordable disc
  • CD-RW rewritable disc
  • CD-ROM discs are suitable for transferring the same data to concave pits on a substrate and copying and distributing them in large quantities.
  • CD-R and CD-RW can record data that can be added or rewritten arbitrarily, and are suitable for data storage at the individual level.
  • CD-RW is expected to be an inexpensive and large-capacity storage medium for backup that replaces floppy disks and MO disks.
  • a CD-RW medium is provided with a non-rewritable information recording area in which rewriting and erasing are prohibited in a special format, and the rest is made a rewritable information recording area. Reading and writing are performed using a dedicated CD-RW drive that can restrict writing and reading in an information recording area exclusive format that cannot be used.
  • many drives that can record on both CD-R and RW media have been released based on the CD-R drive developed prior to CD-RW. I have.
  • a rewritable disc (Partial ROM, P-ROM) having a read-only (ROM) area as a part of the recording area is preferable in that it enables both data distribution and recording of user data.
  • the realization is desired.
  • the hybrid disc format is originally specified for CD-RW
  • the multi-session format originally specified for CD-R is not used.
  • only the postscript function is considered.
  • ROMZRAM mixed disk Partial ROM, P-ROM disk
  • ROM area composed of a series of pre-pits and has a freely rewritable RAM area using CD-RW.
  • magneto-optical disk having a ROM area partially composed of a prepit array.
  • the ROM area is covered with the same recording medium as the RAM area as a reflective layer.
  • the change in reflectance intensity is detected when data consisting of pre-pit rows is originally reproduced, and the change in polarization is detected through a complicated polarization optical system when detecting magneto-optical signals.
  • the reproduction optical system can easily distinguish the ROM, even if the magneto-optical signal is erroneously recorded in the pre-pit row, the signal reproduction system is not affected at all, and the ROM data is not destroyed.
  • the ROM / RAM region has the same layer structure.
  • the phase change recording signal peripheral in the phase change recording layer
  • the RAM recording signal is superimposed on the pre-pit data. Doing so may destroy the ROM data.
  • the recording system recognizes the ROM area without depending on the operating system, or prohibits rewriting of the recorded area, and thereafter as the ROM area.
  • a system that can be recognized is required, especially compact discs that are originally read-only and data formats
  • the recording system is required to devise ways to recognize the ROM area and RAM area.
  • a specific application of P-ROM using a phase change medium is a CD of a textbook used for repetitive practice of language and music.
  • a demonstration of a foreign language sentence or a musical measure is played back as application data, and the user is prompted to repeat it, and the user immediately records the repeated repetition.
  • the new input information is recorded in the user data area.
  • the demonstration is divided into units of several seconds to several tens of seconds to make it easy to repeat the repetition, and the demonstration and the recording of the user data need to be performed repeatedly in such a time range. Yes, the time required to switch between demonstration and user data recording should be as short as possible.
  • the application program is stored on a single CD-RW disc, the program is reproduced, the demonstration data is reproduced, and the demonstration is executed. disk If it is possible to record on the same recording / reproducing apparatus, it is very convenient.
  • such an application usually records two types of data from an executable program, a main routine and a collection of demonstration data consisting of multiple contents, as ROM data.
  • the main routine is a program in which a menu screen is started as a user interface and various processes are executed according to a user's selection. If the user selects a specific demonstration according to the menu screen, the selected data is obtained from the demonstration data collection, and the demonstration is executed by the program in the main routine.
  • An object of the present invention is a P-ROM, a data recording method, a reproducing method, and an erasing method, which are easy to manufacture and have little risk of destruction or falsification (falsification) of ROM data, and an optical information recording medium.
  • a data recording method for a rewritable phase change optical disk a data erasing method for a rewritable compact disk, a data erasing method for a rewritable phase change recording medium, a method for erasing read-only data, and a recording / reproducing apparatus. It is in.
  • the present invention relates to a rewritable compact disc having both a read-only area and a rewritable area. Disclosure of the invention
  • a first gist of the present invention is an optical information recording medium in which a phase-change recording layer is provided on a substrate, and the information recording area has a read-only area and a rewritable area.
  • the read-only area and the rewritable area have the same layer configuration, and the data and address information of the read-only area and the rewritable area have the same logical structure.
  • It consists of data units, A configuration is adopted in which additional data that can be identified as read-only or rewritable data is provided for each of the units or a data unit including a plurality of the units. Therefore, in this way, originally rewritable data can be used as logical ROM data.
  • CD-RW can be used as a write-once medium in appearance.
  • the second aspect of the present invention is the optical information recording medium according to the first aspect, wherein the address added to the basic data unit and the additional data are the rewritable area and the read-only area.
  • the configuration described in advance on the substrate is adopted.
  • information in the read-only area is obtained by a plurality of pre-pit rows provided on a substrate. Adopt configuration.
  • a fourth aspect of the present invention is the optical information recording medium according to the second or third aspect, wherein the rewritable area has a center line predetermined with respect to the scanning direction of the recording / reproducing light beam. And the center line of the pre-pit row in the read-only area has a meander of substantially the same amplitude as the amplitude of the groove in the scanning direction of the light beam.
  • a configuration is adopted in which continuous address information is provided by meandering of the groove and meandering of the center line of the prepit row.
  • the carrier frequency due to the meandering of the groove and the meandering of the center line of the prepit row is a frequency based on the digital information. Modulation or phase modulation is used, and a configuration is adopted in which additional data is added.
  • a sixth aspect of the present invention is the optical information recording medium according to the first aspect, wherein the information in the read-only area has an optical property with respect to a peripheral area in the phase change recording layer.
  • a configuration is adopted in which a mark sequence formed by the difference in quality is obtained, and a write prohibition process is performed on the mark sequence.
  • a seventh aspect of the present invention is the optical information recording medium according to the first to sixth aspects, wherein a configuration is employed in which fixed-length data is used as a basic data unit having additional data. I do.
  • an eighth aspect of the present invention employs a configuration in which, in the optical information recording medium according to the first to seventh aspects, data in a recording area is an EFM modulation signal compatible with a compact disc.
  • the ATIP frame specifies whether the attribute belongs to a rewritable or a read-only attribute. Is adopted.
  • the ATIP information is described in absolute time of a two-digit BCD code in units of minutes, seconds, and frames.
  • Ml, S1, and F1 the most significant digit of the 8 bits representing the minute, second, and frame
  • (0, 0) of (Ml, S1, F1) in the program area is used. , 0), (0, 0, 1), (0, 1, 0), and (0, 1, 1).
  • the EFM frame specifies whether the attribute belongs to a rewritable or a read-only attribute.
  • Adopt a configuration that
  • the 12th gist of the present invention relates to the optical information recording medium of the 1st gist, wherein the sub-code corresponds to a specific two bits of the Q channel of the sub-code, A configuration in which the attribute of the specified frame is defined is adopted.
  • a thirteenth aspect of the present invention is the optical information recording medium according to the eighth aspect, wherein the block specifies whether the block belongs to a rewritable or read-only attribute. Is adopted.
  • the fourteenth aspect of the present invention corresponds to the optical information recording medium according to the thirteenth aspect, wherein the optical information recording medium corresponds to a specific two bits of a plurality of bits describing mode information included in a block header. Then, a configuration in which the attribute of the block is defined is adopted.
  • a fifteenth aspect of the present invention is the optical information recording medium according to the first to fourteenth aspects, wherein the attribute of whether or not rewritable is further provided is an attribute of whether or not rewritable only for the first time. And an attribute indicating whether or not repetitive writing is possible.
  • a program area is divided into a plurality of sessions in accordance with a multi-session format, A configuration is adopted in which some of the divided sessions are dedicated to reproduction and other divided sessions are rewritable.
  • a seventeenth aspect of the present invention is the optical information recording medium according to the sixteenth aspect, wherein the program area is defined as a first session including read-only data having an ISO966 file structure. It is divided into a second session consisting of a rewritable area, and the user data and the read file of the first session are used as read-only data, and a read-in area, a PMA area, and a PCA area are rewritable.
  • the eighteenth aspect of the present invention is the optical information recording medium according to the sixteenth or seventeenth aspect, wherein the session is rewritable or unreadable in a lead-in area of each session in a multi-session format. Adopt a configuration that includes information indicating which attribute belongs to playback only.
  • a nineteenth aspect of the present invention is the optical information recording medium according to the eighth to eighteenth aspects, wherein the ATIP of the lead-in area or the lead-in area of the first session of the multi-session format.
  • a configuration is adopted in which the special information described in (1) contains information indicating that the optical information recording medium has a read-only area and a rewritable area.
  • a twenty-fifth aspect of the present invention is the optical information recording medium according to the eighth to eighteenth aspects, wherein the EFM data in the read-in area or the lead-in area of the first session of the multi-session format.
  • a configuration is used in which information indicating that the optical information recording medium has a read-only area and a rewritable area is included.
  • the three types of data areas of the master ROM, post ROM and RAM can be mixedly mounted on the same disk. Furthermore, the rewritable area given the recordable attribute only once (first time) by A TIP can be used as a pseudo write-once medium on the user side, and the user can create a master ROM area.
  • a twenty-first aspect of the present invention relates to a rewritable phase-change type optical disc, which is provided with a phase-change recording layer on a substrate and has a read-only area and a rewritable area in an information recording area.
  • a data recording method comprising: a transfer step of transferring program data recorded in an executable format in the read-only area to an external computer; and automatically executing the program data on an external computer to enable a rewritable area.
  • a configuration having an execution step of recording data in the area is adopted.
  • the system is double-rewritable on the system, and the reliability of ROM data corruption prevention is enhanced. It can also be fully compatible with existing formats.
  • a twenty-second aspect of the present invention is the optical information recording medium according to the first aspect, wherein identification information indicating a rewritable type including a partial read-only area is previously written on a substrate.
  • the configuration described as pre-pit or groove deformation is adopted.
  • the data of the read-only area is composed of a series of prepits, and the address information of the read-only area together with the identification information.
  • the configuration is described in advance as a pre-pit or groove deformation on the substrate, and the file management information of the file included in the read-only area and the rewritable area is described in the rewritable area.
  • the disc when the disc is inserted into the recording drive, it is possible to recognize that the disc is a P-ROM disc, and the ROM area File management information can be obtained and saved in a memory on the system. Also, only the file management information is erased or overwritten to initialize the disk incorrectly, making it impossible to access the ROM area, or overwriting the ROM without recognizing the existence of the ROM area and destroying the ROM data. Can be prevented. Furthermore, the ROM data can be erased by overwriting data different from the ROM data on the phase-change type recording layer of the read-only area having ROM data consisting of a pre-pit sequence. The side can more reliably hide data that the user does not want to see.
  • a twenty-fourth aspect of the present invention is a data erasing method for a rewritable phase-change recording medium, wherein a phase-change recording layer is provided on a substrate, and a read-only area is provided in an information recording area.
  • identification information that is described in advance as a prepit or groove deformation on a substrate and indicates that the recording medium is a rewritable type including a read-only area partially including a prepit array or a groove deformation.
  • Recognition step of recognizing a file a memory transfer step of acquiring address information of a read-only area and transferring the address information to a storage device, and an erasing step of erasing file management information described in a file management area of a recording medium. And a re-recording step of recording the address information of the read-only area transferred to the storage device in the file management area.
  • the twenty-fifth aspect of the present invention resides in that a compact disc based on information recorded in a lead-in area of a leading session area in a multi-session format compact disc having a plurality of session areas having a lead-in area.
  • a configuration is provided that includes the file structure of the read-only prohibited area and a re-recording step of recording the head address of the rewritable area.
  • this eliminates the need to directly erase the ROM data by overwriting, thereby preventing the erasure of the ROM data due to a malfunction in the simple erase operation.
  • a twenty-sixth aspect of the present invention is the optical information recording medium according to the first to the twenty-second, twenty-second, and twenty-third aspects, wherein the read-only area is recorded by a pre-pit row.
  • a configuration having an area is adopted.
  • the twenty-seventh aspect of the present invention is the optical information recording medium according to the twenty-sixth aspect, wherein a predetermined update-free application program is stored in the first read-only area, An updatable or customized application program is stored in the second read-only area, and a user data recording area capable of recording at least user data related to the application program is provided in the rewritable area. I do.
  • the ROM data can be made untamperable, erasable, and indestructible, and at least the recording drive can recognize the ROM area.
  • a twenty-eighth aspect of the present invention is that an application program area in which data of a predetermined application program is stored in a specific continuous area in a program area is formed as a reproduction-only area having a reproduction-only attribute, A user data recording area in which at least user data related to the application program can be recorded in a remaining program area of a specific continuous area is set as a rewritable area having a rewritable attribute, and the application program is reproduced. And a recording / reproducing apparatus for recording / reproducing user data related to the application program, wherein the recording / reproducing apparatus can recognize that the medium is a rewritable phase-change optical disk having a read-only area partially loaded with a medium.
  • the application data of the program retrieves the program capable of executing the program contents Executing means, information input means capable of inputting required information in accordance with an application program executed by the program executing means, and accessing the user-one data recording area to be input by the information input means. And a recording means capable of recording the information as user data. Therefore, in this way, for example, in addition to language learning, the first version of the application program is stored in the master ROM area, and when a partial version up is required, only the part necessary for program correction is saved. It can be stored in the post ROM area.
  • a twenty-ninth aspect of the present invention is directed to an optical information recording medium in which a read-only data is formed by a plurality of prepit rows provided on a substrate, wherein a phase-change recording layer is provided on the substrate.
  • a method for erasing read-only data wherein a configuration is adopted in which the read-only data cannot be read by overwriting the phase-change recording layer with data different from the read-only data.
  • FIG. 1A is a schematic view of a guide groove in a rewrite area where data is not recorded.
  • FIG. 1 (b) is a schematic view of a guide groove in a read-only area composed of a series of pre-pits.
  • FIG. 2 is a waveform diagram of an analog signal of the EFM modulation signal.
  • FIG. 3A is a schematic diagram showing a layer structure of a CD-RW disc to which the present invention is applied.
  • FIG. 3 (b) is a schematic view of a recess of a CD-RW disc.
  • FIG. 4 (a) is a diagram for explaining the area of a CD-RW disc to which the present invention is applied.
  • FIG. 4B is a perspective view of a CD-RW disc to which the present invention is applied.
  • FIG. 5 is a diagram showing the data structure of ATIP.
  • FIG. 6 is a flowchart for writing a file using ATIP.
  • FIG. 7 is a diagram showing a block in which 98 frames are arranged.
  • FIG. 8 shows the data structure of the Q channel.
  • FIG. 10 is a diagram showing a bucket structure in fixed length bucket recording.
  • FIG. 11 is a flowchart for writing a file using a block attribute.
  • Figures 12 (a) to 12 (d) are area configuration diagrams corresponding to the P-ROM format.
  • FIG. 13 is an explanatory diagram of an example of an area configuration of a CD in which a multi-session format is divided into three sessions.
  • Figure 14 is a flow chart of attribute determination for each session in the case of multi-session.
  • FIG. 15 is a flowchart showing an example of a simple erasing method in the P-ROM.
  • FIG. 16 is a flowchart showing an example of an operation for automatically executing ROM data.
  • FIG. 17 is a diagram showing an example of the P-ROM data arrangement.
  • FIG. 18 is a flowchart for explaining a P-ROM recording / reproducing method.
  • FIG. 19 is a configuration diagram of a recording / reproducing system according to an embodiment of the present invention.
  • FIGS. 20 (a) and 20 (b) are partial enlarged views from the top, schematically showing P-ROMs in which additional data information is written on flat portions between grooves or between pre-pit rows.
  • the recording medium of the present invention is provided with a phase-change rewritable recording layer on a substrate.
  • a phase-change rewritable recording layer on a substrate.
  • reproduction-only information accessible only by a recording / reproducing system is described.
  • the information recording area (program area) of the medium of the present invention includes both a read-only area and a rewritable area
  • a medium having the same layer configuration is provided regardless of the attribute difference.
  • Such a medium usually includes a phase-change recording layer, a protective layer that covers at least one of the phase-change recording layer, and a recording layer on the side opposite to the recording / reproducing light incident side. It is composed of a reflection layer and the like provided.
  • Each layer is usually formed by a sputtering method. Regardless of the film forming method, it is desirable to provide the same layer configuration and the same method for the information recording area in order to simplify the manufacturing process and reduce the manufacturing cost. Therefore,
  • the information is classified into two types according to the manner in which read-only information is provided in the ROM area.
  • One is that the user data is described in advance by deformation of the substrate surface, that is, deformation of prepit rows or grooves due to unevenness or the like, and then covered with the above-described phase-change recording layer.
  • a measure for inhibiting the recording system from rewriting the area is performed.
  • ROM data recorded in the pre-pit row is referred to as master ROM data
  • post-ROM data data that cannot be rewritten due to write-protection processing and is read-only
  • the post ROM data is physically rewritable as a phase change recording signal, that is, a mark row formed by a difference in optical properties from a peripheral area in the phase change recording layer. It is given as a signal.
  • a specific area formed by a substantially continuous recording track and address
  • the program area is filled with ROM data, the area is defined as a ROM area. Call.
  • a write-protected attribute (playback only) is assigned to an unrecorded rewritable area in advance, but a factory or software creator uses a special recording drive.
  • the user is distributed to the read-only area and the user can confirm this as a read-only area.
  • the attribute is defined as a rewritable area that is rewritable in the unrecorded state, and the data is edited once or multiple times by the factory or software creator for editing purposes, or after editing is completed. It may be possible to assign a new write-protected attribute (playback-only attribute) to already-written data and distribute it to users.
  • the rewritable area given the recordable attribute only once (first time) is in the unrecorded state. It can be distributed to users as it is, and can be distributed as a pseudo-write-once medium, allowing users to record only once (first time). In this case, after the user performs recording once (initial recording), rewriting becomes impossible. In other words, even if the rewritable area is physically rewritable, it functions as an unrecorded write-once medium for the user. If the factory or the software creator records the data in this one-time recordable area and distributes it to the user, it is still impossible to write on the user side, so it can be used as a read-only area.
  • RAM data rewritable data
  • RAM area is not necessarily where RAM data is recorded from the beginning, but is an area where data can be written and no write-protection measures have been taken.
  • the present invention proposes a method of assigning attributes according to read-only and rewritable to data so that at least the attributes can be identified from the recording system.
  • the attribute of the data is set for each basic unit of data.
  • the basic unit of data is a unit that is processed as a unit in the data processing of the recording / reproducing drive device.
  • the ATIP 175 seconds It is a unit such as ATIP frame of unit, 98 EFM frame to which sub-code is added by EFM data, and block of 2352 bytes data in CD-ROM format.
  • a packet consisting of multiple blocks can also be considered a basic unit. These are examples of fixed-length data units where the size of each data unit is fixed.
  • the ROM or RAM area itself can be regarded as a track in the CD format as a whole, and when a session is formed in accordance with the multisession format specification of the CD, the session is used. It can be regarded as one unit.
  • a bucket which is not necessarily a fixed number of fixed-length blocks, can be regarded as one data unit. These are not fixed in individual data capacity! / Is an example of a variable length data unit.
  • user data is divided into 2n bytes (512, 102, 4, 2k, 4k, 16k, 32k, 64k, ..., bytes, etc.). Redundant data such as parity bits for errors are added to make the logical minimum basic data unit.
  • This basic data unit is also a type of basic data unit in which a plurality of data units (not necessarily fixed length) are collected. An address and additional data of a data attribute are added to each of these basic data units.
  • the basic data unit fixed-length data, particularly one that is the minimum unit for address assignment.
  • a data attribute can be assigned to a variable-length data unit in which a plurality of fixed-length data units are combined, but in this case, it is desirable to assign the same data attribute to each lower-order fixed-length data unit.
  • the additional data including the address may be added so as to form a series of bit strings as the same bit information as the basic unit of the user data, or may be adjacent to the basic unit of the user data while being spatially separated by another signal. It may be added separately.
  • the former example is an additional bit sequence called a subcode in the EFM signal in the CD format described later, and the latter example is a groove deformation (wobble) also used for CD-R and CD-RW.
  • Is additional data Is additional data (ATIP information).
  • the addition by the additional data may be a pit row arranged between the groove and the pre-bit row, or may be a pit row arranged before and after the user data row in the basic data unit. .
  • the attribute information of a basic data unit indicating whether it is read-only, recordable only once (first time), and (repeatedly) rewritable is described as non-rewritable information on the substrate in advance.
  • the address assigned to each basic data unit is described in advance on the board, and the attribute of the data to be recorded at that address is described in advance for each address, but the description method is rewritten. It is desirable that the signal be described with an impossible signal. Record Dora If the drive side is designed to record data having a predetermined attribute at a predetermined address in accordance with the data attribute information, it is not possible for the user to easily change the data attribute. This is because the risk of being destroyed by overwriting by phase change recording is reduced.
  • the non-rewritable signal here can also be achieved by forming physical deformation such as groove deformation on the substrate by injection molding, but if it is “user-unrewritable”, phase change recording May be used as the recording signal.
  • a recording signal that cannot be rewritten on the user side is a signal that cannot be rewritten from the user side by special processing such as encryption.
  • the address and additional data added in the basic data unit are written on the substrate in advance in the rewritable area and the read-only area.
  • the data, data attributes and address information in the ROM area and the RAM area have the same logical structure. That is, they have the same basic data unit, and for each of the basic units, the user data is divided and the data attribute and the address information are added. As a result, reproduction (decoding) can be performed by the same reproduction (logic) circuit.
  • concentric or spiral guide grooves are usually formed so that the light beam can be guided even in the unrecorded state.
  • the groove meanders so as to have a predetermined amplitude in the running direction of the light beam.
  • a guide groove is usually formed concentrically or spirally, so that the light beam scans in a substantially circumferential direction and follows the inner groove, while the groove meanders in a radial direction. Is formed.
  • the post ROM area it is preferable to have a guide groove similar to the above in order to perform recording first.
  • a pre-pit row is provided in the master ROM area.
  • the center line of the pre-pit row has an amplitude substantially equal to the amplitude of the guide groove in the scanning direction of the recording / reproducing light beam. It is preferable to provide pre-pits with meandering. As a result, consecutive addresses in the master ROM area and rewritable area Information can be given.
  • the guide groove including the center line of the pre-pit row is referred to as a guide groove in a broad sense.
  • the guide groove 50 is a concave portion surrounded by the groove wall surfaces 50a and 50c, and usually has a convex shape of the original plate (stamper) on the substrate. Is obtained by transcription.
  • the address information is given by the meandering of the guide groove 50, and the address information is obtained by reading the shape of the groove with a laser beam.
  • the address by the meandering groove can be given by performing a frequency modulation (FM modulation) or a phase modulation on a constant frequency wave (carrier wave) by digital data of 0 and 1.
  • FM modulation frequency modulation
  • carrier wave constant frequency wave
  • addresses assigned along guide grooves in a wobbling manner can be applied to the above-mentioned concept of guide grooves in a broad sense, as shown in Fig. 1 (b). If the actual center line 50b of the pit row (pre-pit) 52 is meandered at the same frequency as the groove 50 of the RAM section, a continuous carrier wave is used regardless of the master ROM, post ROM, and RAM area. It is possible to add a dress by meandering the groove. Also, it is possible to add not only the address but also other additional information.
  • the ROM area and the RAM area Since it is desirable from the reproduction system that the ROM area and the RAM area can be accessed and reproduced without distinction, it is desirable that the ROM area and the RAM area have address information having a continuous serial number.
  • the address information may be provided as a groove deformation as described above, or may be included as a part of recording data. If it is included as part of the recording data, the data in the RAM area and the ROM area can be given the same format and address information having the same logical structure can be added.
  • the amplitude of the groove meandering 50 in the RAM area and the actual center line 50b of the pit row 52 in the master ROM area are used.
  • the meandering amplitude is almost the same, the address information of the entire area can be reproduced without interruption by one groove meandering reproducing circuit.
  • substantially the same means that Means the extent to which approximately equal signal amplitudes can be obtained on a road, and usually the magnitude of one amplitude is less than twice the magnitude of the other.
  • a push-pull signal reproducing circuit is used for reproducing the groove meandering.
  • the reproducing circuit can be applied to any of FIGS. 1 (a) and 1 (b).
  • the push-pull signal circuit detects the diffracted light of the light reflected from the groove or the concave pit with a two-divided detector divided into the left and right sides of the groove and calculates the difference between the two. Technology.
  • the ROM signal consisting of the pre-pit string and the recorded signal in the RAM area by phase change recording can be decoded by the same logic circuit using the same modulation method.
  • the recording signals in both areas have substantially the same reflectance and modulation degree.
  • a signal due to a concave pre-pit in a CD-ROM usually has a low reflectance at the pit position due to the phase difference of the reflected light. It is desirable that the reflectance be low.
  • the unrecorded state corresponds to the crystalline state
  • the recorded state corresponds to the amorphous state.
  • the reverse may be the case, and different crystal states may correspond to each other.
  • the master ROM area since the master ROM area also has the same layer configuration as the RAM area, it is difficult to distinguish the ROM area and the RAM area from the playback system. Since it is physically possible to overwrite data in the phase change recording layer itself, not only in the post ROM area, but also in the master ROM area, it cannot be altered, erased, or destroyed as ROM data. For this to be impossible, at least the recording drive must be made aware of the ROM area.
  • phase-change recording medium is a rewritable medium (P-ROM) partially having a read-only area
  • P-ROM rewritable medium
  • a P-R It is desirable to describe identification information indicating that it is an OM, and it is more desirable that the identification information is previously described on the substrate as master ROM data such as prepit / groove deformation.
  • the identification information indicating the rewritable type including the partial read-only area is: This will be described in advance as a pre-pit or groove deformation on the substrate.
  • the file management information of the user data recorded in each area be collectively described in the RAM area regardless of the ROM area or the RAM area. In this case, it is necessary to prevent the file management information in the ROM area from being accidentally lost by erasing or overwriting the file management information as the RAM data. For this reason, it is desirable that address information for accessing the ROM area is also described (registered) in advance in the specific area as the master ROM area.
  • a set of ROM area or RAM area composed of consecutive addresses is regarded as a variable-length data unit, and each of the variable-length data unit is provided with a ROM or RAM. Can be given a data attribute.
  • address information of each ROM area composed of variable-length data units consisting of the consecutive addresses is preferably registered together with the data attribute in a specific area on the disk. It is desirable to do it.
  • the address information to be registered it is desirable to register not only the start address of each area but also its length (capacity) or end address.
  • the disc is a read-only type having only a read-only area, a rewritable type (P-ROM) partially having a read-only area, or a rewritable type having only a writable area.
  • Disc identification information that can identify any of the above. It is desirable that the information is written in a specific area on the disc.
  • the data of the read-only area is composed of a pre-pit string, and the address information of the read-only area is described in advance as pre-pits or groove deformation on the substrate together with the identification information.
  • the file management information of the files included in the area is described in the rewritable area.
  • ROM data can also be erased.
  • a factory or software creator can more reliably hide data that the user does not want to see.
  • Some data to be updated in the M area can be erased using the above erasing method.
  • the method for erasing read-only data comprises providing a phase-change recording layer on a substrate, and optical information recording in which read-only data is formed by a plurality of pre-pit rows provided on the substrate.
  • the additional data added to the basic data unit which is the minimum unit of address assignment, include predetermined data attribute information.
  • the data in the recording area is an EFM modulated signal compatible with a compact disc. Therefore, in the following, the present invention is described in detail using the format and terminology of CD and CD-RW, but is limited to the CD format itself for the same purpose. Not something.
  • CD Family I co-authored by Heitaro Nakajima, Takao Ibashi, Hiroshi Ogawa, Ohmsha
  • Compact Disc Reader co-authored by Heitaro Nakajima, Hiroshi Ogawa, Ohmsha, rCD—R / RW Official Guidebook ”, written by Orange Forum, Etasedo Press Co., Ltd., and JP-A-11-250522.
  • the logical data structure of CDs is mainly defined by the rules of the Red Book and suitable for music data, and the format specified by the Yellow Book and suitable for general-purpose block-based data recording that has become International Standard IS09660.
  • mode mode 1 of the CD-ROM format for data recording
  • mode is the structure of the user data and errors added to the user data. It is related to the difference in the contents of the correction information and does not affect the essence of the present invention.
  • CD-RW is defined by Orange Book 'Part 3.
  • the recorded logical data structure basically conforms to that of a CD-ROM, and can be played back using a CD-ROM playback circuit.
  • Recorded E FM random signal is a reproduced signal waveform in FIG. 2, I t. a 1 5-25% when converted to p in reflectance, 1 1 T mark amplitude 1 "and I t.
  • the ratio of p I" Zl t. p is 0.55 to 0.7, and the jitter of the mark length and mark-to-mark length of each mark from 3 T to 11 T is 35 nsec or less at CD linear velocity (1.2 to 1.4 mZs). If the above conditions are satisfied, it can be reproduced as a CD compatible signal with a drive that supports rewritable compact discs.
  • FIG. 3A is a schematic diagram showing a layer structure of a CD-RW disc 10 to which the present invention is applied.
  • the layer structure of the CD-RW disc 10 shown in FIG. 3 (a) is a multilayer (polycarbonate substrate) 110 f having a guide groove and a concave portion 49 serving as a pre-pit on its surface.
  • the phase-change recording layer (recording layer) controls the amount of absorption of laser light at 10 d, and adjusts the reflectivity by the multiple interference effect.
  • a protective layer 1 10 e, 110 c for controlling heat radiation from the recording layer and suppressing thermal deformation of the recording layer and the substrate, and a concave portion 49 formed on the substrate 110 f covering the substrate 110 f.
  • the protective coat 110a protects the surface of the optical disc from being damaged. Further, the protective coat 110a may be covered so as to fill the recess 49 instead of covering the surface shape of the recess 49 as shown in FIG. 3B described later.
  • the focused light for recording / reproduction is focused on the recording layer 11 Od via the substrate 110 f.
  • an optical system having a wavelength of about 780 nm and a numerical aperture (NA) of the focusing lens of about 0.5 is used for recording / reproducing of CD-RW.
  • FIG. 3B is a schematic view of the concave portion 49 of the CD-RW disc 10.
  • the concave portion 49 shown in FIG. 3B reproduces the shape of the substrate layer 110f.
  • Each layer is often formed by a sputtering method. Further, the same layer configuration can be formed as the information recording area regardless of the film forming method, so that the manufacturing process is simplified and the manufacturing cost can be reduced.
  • FIG. 4 (a) is a diagram for explaining the area of a CD-RW disc to which the present invention is applied
  • FIG. 4 (b) is a perspective view of a CD-RW disc to which the present invention is applied.
  • the CD-RW disc 10 shown in Figs. 4 (a) and (b) has a PCA (Power Calibration Area), a PMA (Prog am Memory Area), a lead-in area, It has a data structure consisting of a program area and a lead-out area.
  • PCA is a test write area for determining the optimum recording power
  • PMA is a temporary file management information recording area specific to CD-R and CD-RW
  • the lead-in area is originally a CD-ROM format.
  • the area for recording file management information and disk management information called TOC (Table of Content), and the lead-out area are used to indicate the end of EFM data, and the program area records user data.
  • the program area has both a read-only area and a rewritable area. In order to maintain reproduction compatibility with the conventional CD-ROM, it is necessary to record predetermined information in the lead-in and lead-out areas.
  • the region from the start end B of the PCA region to the end end D of the lead-out region is covered with the same phase change medium. More specifically, it has the layer configuration described with reference to FIG.
  • this optical information recording medium is an area covered with a phase-change medium and having a read-only area having six layers and a read-only area, and an area covered with a phase-change medium and having six layers.
  • the rewritable area has the same layer structure as that of FIG. 1, and has a rewritable area in which information can be rewritten.
  • the rewritable area has a meandering guide groove 50 provided to guide laser light as shown in FIG. 1 (a). Is provided.
  • the program area There are two types of areas for implementing the partial ROM function in the program area. One is to use a pre-pit row (a row of pits formed beforehand) by the concave portions 49 formed in advance on the substrate 110f. This area is where data is recorded and a recording layer 110e is provided on a substrate 110f (master ROM area). The other area is an area (post ROM area) where the recording drive device is prohibited from rewriting data in a part of the area after recording data as a mark in the recording layer 110d.
  • a pre-pit row a row of pits formed beforehand
  • This area is where data is recorded and a recording layer 110e is provided on a substrate 110f (master ROM area).
  • the other area is an area (post ROM area) where the recording drive device is prohibited from rewriting data in a part of the area after recording data as a mark in the recording layer 110d.
  • address information and a synchronization signal expressed in absolute time by the guide groove are provided.
  • (AT IP information, absolute time in pregroove) is desirable. Absolute time The wrist is expressed in minutes, seconds, and frames with 1Z75 seconds as the minimum unit (frame).
  • the AT IP starts from 0 minute 0 second 0 frame (hereinafter referred to as 00:00:00) and continues up to 79:59:74 frame at the maximum.
  • the maximum AT IP address of the program area can change.
  • the program area shifts to the lead-out area at point C in FIG. 4 (a).
  • the AT IP address in the lead-out area increases continuously, taking over the last AT IP address in the program area. Usually, the length of the lead-out area is about 112 minutes.
  • the PCA, PMA, and lead-in areas are located from point B to point A in Fig. 4 (a).
  • the AT IP address is reset to 00:00:00 at point A, and then decreases sequentially from 99:59:74 from point A to point B (the first address of PC A).
  • AT IP addresses in the PCA, PMA, and Reedin can only be used in the 80 or 90 minute range.
  • the attribute of rewritable or read-only is defined in at least one of three layers of an AT IP frame, an EFM frame, and data in block units of about 2 kbytes. Is preferred. This is because it is related to the smallest unit of data that can be manipulated in a CD-ROM system, and allows data attributes to be defined at lower levels.
  • the attribute of being rewritable further has an attribute of whether or not rewriting is possible (only once or only the first time) and an attribute of whether or not rewriting is repeated. That is, in the most preferable mode, at least one of the above three layers is write-protected (for reproduction only), is recordable only once (only for the first time) (functions as a post-ROM area after recording), and is rewritable. (Repetitive rewriting is possible).
  • the write-protect (reproduction-only) attribute prohibits overwriting the master ROM or post-ROM data and declares that it is to be treated as read-only data.
  • An attribute that can be rewritten only once can record user data only once at the address given the attribute, except for the recording at the time of formatting, which will be described later. Achieving R disk, CD-RW disk This is effective to prevent data tampering in the system.
  • conditional reproducible means, for example, data that cannot be reproduced unless a predetermined code or the like is input.
  • conditionally rewritable means that recording cannot be performed unless, for example, a predetermined code is input.
  • CD-RW there are at least three layers as a method of adding address data. This is related to the basic data unit that defines a chunk of data in the CD format. That is, since an address is added for each basic unit of data, it is natural that data attribute information is also added for each basic unit of address data, and it is necessary to use the redundancy of the address information data bits. preferable. Well, as the hierarchy of address assignment
  • This method is applied at the lowest level and is pre-formed on the board.
  • a read-only area or an area that can be rewritten only once is defined by the shape to be formed. Specifically, the AT IP information described in the page is used.
  • the AT IP information has a minimum address unit (frame) of 1/75 second and the spatial frequency of groove meandering is 22.05 kHz, so that one frame includes 294 meanders. Also, since one frame contains 42 bits of information, one bit corresponds to every seven periods. In other words, frequency modulation (FM modulation) of ⁇ 1 kHz is performed every seven cycles, depending on whether the data is 0 or 1.
  • the ATIP information 42 bits include absolute time information and accompanying error correction information, as well as synchronization bits for decoding the data.
  • FIG. 5 is a diagram showing a data structure of ATIP.
  • the three types of the pipes 22a, 22b, and 22c shown in FIG. 5 are obtained by decoding the FM-modulated wobbles, respectively.
  • Byte 22a represents minute information
  • byte 22b represents second information
  • byte 22c represents frame information.
  • BCD Binary Coded Decima 1
  • the AT IP information is the sum of 4 bits for each digit. It is represented by 8 bits (1 byte). Then, the most significant bit (Ml, Sl, F1) of each byte 22a, 22b, 22c is used, respectively.
  • the value of the AT IP information in the program area is specified as a compact disk from 00:00:00 frame to a maximum of 79:59:74 frame. No data corresponding to the 90-minute range appears.
  • Ml, S1, and F1 which are the MSB (Most Sig nif ican tBit, the most significant bit) of each unit.
  • MSB Mobileost Sig nif ican tBit, the most significant bit
  • the combination of the Ml, S1, and F1 bits (M1, S1, F1)-(0, 0, 1), (0, 1, 0), (0, 1, 1) can be used as attribute information of the corresponding ATIP frame, and the lower-order bit can describe the absolute time of the ATIP frame.
  • the present invention proposes to assign a special (Ml, S1, F1) combination, which has not been defined in the program area, to the attribute information of the AT IP frame.
  • This method is excellent as a method that can be implemented without greatly compromising the compatibility.
  • the AT is determined.
  • Data corresponding to the IP frame is determined to be rewritable data as before. If (0, 0, 1), (0, 1, 0), (0, 1, 1), the attributes of the AT IP frame can be defined.
  • the center line 50b of the pre-pit row 52 may meander with substantially the same amplitude as the rewritable area as shown in FIG. 1 (b).
  • the push-pull signal of the pre-pit can be easily reproduced as the wobble signal and ATIP information just like the wobble signal due to the meandering groove, and no special circuit is required.
  • FIG. 6 is a flowchart for writing a file using ATIP.
  • the optical head is moved to a predetermined address (step A1), and the ATIP is decoded (step A2). Then, in step A3, it is determined whether or not the specific address has been reached. If the specific address has not been reached, a No route is taken, and the processing from step A1 is repeated. On the other hand, if the specified address has been reached, a Yes route is taken, and (Ml, S1, F1) is determined in step A5.
  • step A5 the attribute of the AT IP frame is determined by (Ml, S1, F1). If this attribute is write-protected, a write-protected route is taken. In step A6, the attribute is determined to be a read-only attribute. In step A7, an error message is sent. The optical head moves to another address, and the processing from step A1 is repeated. If it is rewritable in step A5, a rewritable route is taken.In step A9, it is determined that the attribute is rewritable. In step A10, writing is started, and in step A11, the writing routine ends. .
  • a step A9 for moving the optical head to another address is provided, but the step A7 for sending the error message is provided. Can also be terminated.
  • the recording drive since the write-protected attribute is recorded in the AT IP signal, the recording drive always decodes the AT IP address when accessing the predetermined address. As soon as the combination of B is detected, measures such as stopping the power of the recording laser beam can be taken, and the routine can be shifted to the routine of abnormal processing.
  • the playback system such as a CD-ROM drive
  • the playback system usually obtains address information only from the subcode recorded by the EFM signal, so that the playback system receives the above-mentioned irregular AT IP information. Is not affected. Also, it will not affect playback on existing CD-ROM drives.
  • the firmware internal program for drive control
  • the firmware needs to be changed only on the recording system side, but such a change only requires rewriting the program as a version upgrade of the device driver on the recording device side. This is preferable because no change in drive hardware is required.
  • the mixed ROM area and RAM area can be logically linked by using the bit value of (Ml, S1, F1). And seamless file management.
  • the master ROM area can be created by the pre-pit string to which the write-protect (attribute-only) attribute has been added by ATIP, and the write-protection can be reliably performed.
  • a write-protected (playback-only) attribute is assigned to a part of the unrecorded rewritable area in AT IP, and only a factory or software creator can use a special recording drive device that can ignore the write-protected process. If data is recorded and edited, a general user's recording drive device can create a post ROM area that functions as ROM data. Then, a rewritable attribute is given only to the remaining rewritable area so that the user can use it as a RAM area.
  • the three types of data areas of the master ROM, post ROM and RAM can be mixedly mounted on the same disk.
  • the rewritable area given the recordable attribute only once (first time) by the AT IP can be used as a pseudo write-once medium on the user side, and the master ROM area on the user side. Can be created.
  • FIG. 7 is a diagram showing a block in which 98 frames (sectors) are arranged.
  • the block 23 shown in FIG. 7 has a synchronization signal (12 bytes) indicating the beginning of the block, and a header (4 bytes) including writable and Z non-writable information such as an address.
  • the recording drive adds additional data (288 bytes) for error correction to the original data, and scrambles the data. After that, it is divided into 24 bytes x 98 rows, and parity correction bits and sub-codes for error correction are added to each row, and EFM modulation is performed. Each line is called an EFM frame.
  • User data consisting of 2352 bytes is called a main channel and is divided into a matrix of 24 bytes x 98 rows. When each line is divided every 12 bytes, it becomes data corresponding to the left and right channels of the stereo music data. After additional error correction bits are attached to each row, 8-bit data called subcode is added. In other words, the address and data attribute information are added to the block of 2352 bytes by the 8-bit X98 additional data.
  • the header information of the above blocks is processed at the lower IC level, so data attributes that can be recognized not only by CD-ROM drives but also by music CD drives can be added.
  • a matrix of 98 rows is formed by using 8 bits of the subcode as 1 row, and a 98-bit (12-byte) data string, with each column as a unit, is called a channel.
  • P, Q, R, S , T, U, V, and W channels In particular, one of them is called a Q channel, and address information is described in 98 bits of the Q channel.
  • the subcode includes 8 ⁇ 98 bits, there are many unused bits, and a new data attribute can be added using the unused bits.
  • an example of using the control bits using the Q channel will be described.
  • FIG. 8 shows the data structure of the Q channel.
  • the Q channel data 24 shown in FIG. 8 has a synchronization bit (S0, S1), a control bit (CONTROL), and other data bits.
  • the control bit (CONTROL) indicates the write attribute, and has (SC 3, SC 2, SC 1, SCO) from the upper bits.
  • the four bits (SC3, SC2, SC1, SCO) of the CONTRO L field of the subcode Q channel shown in FIG. 8 are used as follows. sand In other words, according to the contents described in Japanese Patent Application Laid-Open No. H11-250522, the four CONTROL bits are specified as shown in Table 1 in the Red Book Noise Book. Here, X may be either 0 or 1. The provisions for item numbers 1 to 6 are already used in the current standard. Table 1 CONTROL bit assignments
  • item numbers 1 and 2 relate to the attributes of the audio signal, respectively. Furthermore, as can be seen from item numbers 5 and 6, the SC 1 bit cannot be used, regardless of the other attributes of the data, since it is assigned to the designation of digital copying prohibited Z permission.
  • Channels R through W can have up to 64 application specifications (CD—G or CD — TEXT, etc.), and it is preferable to use the AT IP shown in (A1) or the block attribute limited to the CD-ROM format shown in (A3).
  • FIG. 9 is a flowchart of file writing using an EFM modulation signal.
  • the optical head is moved to a predetermined address (step B1), and ATIP decoding is performed (step B2). Then, in step B3, it is determined whether or not the specific address has been reached. If the specific address has not been reached, a No route is taken and the processing from step B1 is repeated. On the other hand, when the specified address is reached, a Yes route is taken, and in step B4, the EFM signal is decoded.
  • step B5 attribute determination is performed from the decoded Q channel data. If this attribute is write-protected, a write-protected route is taken, and in step B6, it is determined that the attribute is a read-only attribute. In step B7, an error message is sent out. The optical head moves to the address, and the processing from step B1 is repeated.
  • step B5 if rewriting is possible, a rewritable route is taken.
  • step B9 it is determined that the attribute is rewritable.
  • step B10 writing is started, and in step B11, writing is started. The routine ends.
  • a step B8 for moving the optical head to another address is provided, but the step for sending an error message is provided. It can also be terminated at B7.
  • data is processed at the lower level IC level, so it is not limited to CD-ROM drives, Data attributes that can be recognized by the drive can be added.
  • the recording drive device can respond by simply updating the device driver incorporated in the firmware and rewriting the program, so that the hardware of the recording drive device does not need to be changed, and the existing device can be used. It can be handled when used. Also, on the playback side, if an error occurs due to other bits entering the (SC 2, SCO) bit, which is undefined conventionally and usually contains (0, 0) data, the firmware is rewritten. May be required.
  • the logically seamless file management can be performed by using the control bits (SC2, SCO) of the Q channel, and the ROM area and the RAM area are stored on the same phase change type medium. Be able to mix
  • the data After editing and recording of predetermined data in a part of the rewritable area by the factory or the software creator, the data is write-protected using the subcode attached to the data. ), A virtual master ROM area can be created. If the write-protected attribute of data in the rewritable area is not changed by the user, it can be prevented from being tampered with against the intention of the post-ROM data creator. Of course, for the master ROM area consisting of the pre-pit sequence, when creating the pre-pit sequence data, give the sub code the write-protect (read-only) attribute. Then, a rewritable attribute is given only to the remaining rewritable area so that the user can use it as a RAM area.
  • the three types of data areas of the master ROM, post ROM and RAM can be mixedly mounted on the same disk.
  • playback is performed in units of blocks specified by the CD-ROM format.
  • Data attributes such as exclusive use and recording prohibition are added.
  • user data is divided into 248 bytes, and additional data is added to the 248 bytes of data to form one block (2 352 (Byte) A considerable amount of data is formed.
  • block 23 (see Fig. 7) consists of a sync (sync) signal (12 bytes) indicating the beginning of the block, and a header (4 bytes) containing writable and non-writable information such as an address. Additional data for error correction (288 bytes) is added. These data except for the synchronization signal are scrambled.
  • the data consisting of the synchronizing signal and the scrambled data is divided into 24 bytes ⁇ 98 rows, and each row includes a parity bit for error correction and a subcode described in (A 2). It is added and EFM modulated.
  • Each block has a header, and to each of these headers, additional data indicating the address and data attribute of each block is added.
  • the header data consists of 4 bytes, of which 3 bytes are used to record the address of each block in the same minute, second and frame units as ATIP (see Fig. 5) in 24 bits. ing.
  • attribute data indicating the mode of each block is added to each header using the remaining one byte (8 bits).
  • Orange Book 'Part 3' specifies the attributes of the block for use in packet recording described later, and is recorded in specific three bits. The other two bits are added with specific information specified in the Yellow Book.
  • the remaining three bits are unspecified empty bits.
  • at least three types of attributes are assigned to these three empty bits, at least, the block is rewritable, write-protected (playback only), and recordable only once (first time). is there.
  • since three types of states need only be assigned at the time of assignment practically, only two bits are required, and any one of the three bits can be freely selected.
  • CD-RW a method called fixed-length bucket recording is used to enable data rewriting at an arbitrary address.
  • FIG. 10 is a diagram showing a packet structure in fixed-length packet recording.
  • the packet 25 shown in FIG. 10 is a data recording unit in the fixed-length packet recording mode of the CD-RW, and the packet 25 is composed of a link (Link) block 25a and a run-in (R) un—in) block 25 b,..., 25 c, user data block 26 a,..., 26 b, and run-out (R un— out) block 27 a, 27 b ing.
  • the link block 25a is a buffer area for preventing data destruction of an existing adjacent bucket caused by a displacement of overwritten data.
  • the run-in blocks 25b, ..., 25c, and run-out blocks 27a are areas for storing additional information to be added to user data.
  • a packet means the smallest unit of data, also called a sector or a cluster.
  • these plural blocks are grouped (one packet), and overwriting is performed for each packet.
  • the user data shown in FIG. 10 is recorded in packets of 64 kbytes (32 blocks). Note that these blocks are described in Orange Book 'Part 3 and will not be described. Furthermore, the file management method for fixed-length packet recording is specified in the UDF version 1.5 described later.
  • the packet structure shown in FIG. 10 is recorded on the entire surface of the disc by an operation called full-formatting.
  • any data may be recorded as user data so as to support fixed-length bucket recording, but in practice, data "0" is recorded.
  • the user data blocks 26a, ..., 26b shown in Fig. 10 contain meaningless data.
  • a fixed-length bucket is overwritten with the link block 25a in two adjacent buckets as the start point and end point, respectively.
  • each block belongs to a link block, a run-in block, a user data block, or a run-out block is recorded in a specific three bits of one byte in the header described above.
  • ROM area can be created. Also, in the case where data is recorded in a pre-pit string according to the fixed-length packet recording format and a master ROM area is created, the attribute of each block of the data is set to write-protected (playback-only). Overwrite to the ROM area can be prevented.
  • the rewritable area to which the recordable attribute is given only once (first time) by giving the attribute for each block on the formatted disk can be used as a pseudo write-once medium thereafter, and therefore, the user side. Use to create a master ROM area.
  • the recording drive of the CD-RW disc 10 can correctly write-protect data from the following operations. I can judge. That is, the recording drive of the CD-RW disc 10 first reads the data of the bucket to be recorded, rewrites the data of the predetermined block of the packet in the memory of the drive, and reorganizes the data in the bucket. After that, the bucket on the recording medium is actually rewritten.
  • the attribute of the block is If the packet has a write-protected (dedicated attribute) block in the packet, an error message to that effect is issued.
  • FIG. 11 is a flowchart of file writing using the block attribute.
  • the optical head is moved to a predetermined address (step C1), and the ATIP is decoded (step C2). Then, in step C3, it is determined whether or not the specific address has been reached. If the specific address has not been reached, a No route is taken, and the processing from step C1 is repeated. . On the other hand, when the packet reaches the specific address, the Yes route is taken, and in step C4, the EFM signal is decoded.
  • step C5 the signal is decoded in block units, and in step C6, the block attribute is determined.
  • step C7 it is determined that the attribute is a read-only attribute.
  • step C8 an error message is sent. The optical head moves to the address, and the process from step C1 is repeated.
  • step C6 if rewriting is possible, a rewritable route is taken.
  • step C10 it is determined that the attribute is rewritable.
  • step C11 writing is started, and in step C12, writing is started. Then, the write routine ends.
  • step C9 for moving the optical head to another address is provided. Can also be terminated at step C8 where is sent.
  • the data attribute is assigned to each block, which is a basic unit of the data in the CD format, so that the determination of the write inhibition or the like can be correctly performed.
  • the recording drive device can overwrite data by using the link block 25a as a start point and an end point in bucket units except when erasing the entire area.
  • the attributes of the link block especially the link block connecting the ROM area and the RAM area, be rewritable.
  • the recording drive device does not need to change its hardware, and only needs to rewrite the driver incorporated in the firmware, so that the CD-RW disk 10 of the phase change type medium in which the RAM area and the ROM area are mixed is mounted. You will be able to get. Since access can be made using the same reproduction circuit in this manner, a data distribution function and a user data recording function can be efficiently realized, and the use of CD-RW discs is promoted.
  • the method of adding a new attribute to the data for each basic unit of the address, distinguishing each address assignment layer, and adding the data attribute in the address unit uses a method that is compatible with the CD format.
  • the data assigned in the upper layer is the same as the data attribute assigned in the lower layer. Preferably they are identical.
  • variable-length data unit in the CD format examples include a session in a track and a multi-session format.
  • a data unit in which a plurality of fixed-length buckets are continuously used is also an example of a variable-length data unit.
  • the header of the run-in block at the head of the track is given the data attribute of the track itself in the header.
  • write-protect read only
  • record once first time
  • rewritable attributes can be assigned to each track.
  • start and end addresses of the track, the data length, etc. are described in the lead-in area as 'TOC' in the subcode Q channel of the EFM signal. It is desirable to describe the attribute of the track. Also, if necessary, subcode
  • each track can be entered in the user data (main channel) to which the Q channel is assigned.
  • the main channel of the EFM signal in the lead-in area (the user data portion in the block structure shown in Fig. 7) only contains dummy data that is normally "zero". It does not matter if the recording drive device reads the main channel as well as the subcode in the lead-in area.
  • the track address information (start / end address. Data length, etc.) has a read-only area attribute represented by the master R0M data consisting of pre-pit strings. It is also possible to write (register) the master ROM data in the main channel of some addresses in the read-in area.
  • variable-length data consisting of a series of multiple packets is master ROM data consisting of a series of pre-pits
  • the address information of the series of packets is masked into the main channel of the lead-in area. Enter (register) as tar ROM data.
  • the address of the first run-in block of the first packet or the address of the first user data block of the first bucket is used as the start address. Then, as the end address, the address of the rear end run-out block or the address of the rear end user data block is used.
  • each address of the run-in, run-out, and link block is skipped (each address is not used), and only the user data block newly adds addresses in order. Be allocated.
  • logical addresses can be used. Focusing on this logical address, the logical address of the first user data block is used as the start address of the ROM area, and the logical address of the last block is used as the end address of the ROM area. Can also be.
  • the program area is divided into multiple sessions in accordance with the rules of the multi-session format, and some of the divided A method for making another session rewritable will be described.
  • the session is write-protected (playback) in the lead-in of each session. It is preferable to describe whether the attribute is "dedicated” or rewritable.
  • the Q channel of the subcode can also be used for this purpose.
  • a single CD consisting of the lead-in area Z program area / read-out area shown in Fig. 4 (a) is divided, and multiple pseudo-CDs are configured on the same CD. Is what you do.
  • FIG. 13 is an explanatory diagram of an example of an area configuration of a CD in a multi-session format divided into three sessions. For each session, the lead-in area at the beginning and the lead-out area at the end are added.
  • the lead-in area of the first session shown on the diagonal straight line on the right side of FIG. 13 coincides with the lead-in area in FIG. 4 (a).
  • AL 2 is a program area of the first session
  • L 2 A 2 is a lead-out area of the first session.
  • a 2 L 3, L 3 L 4 and L 4 A 3 are their respective lead-out area of the second session, a program area, a lead-out area, A 3 L 5, L 5 C and CD is Respectively, the lead-in area, program area, and lead-out area of the third session.
  • the PCA area and the PMA area are provided in the innermost peripheral portion BL of the entire disk, as in FIG. 4 (a).
  • each lead-in area is the same as that in the program area, and sub-codes are also added.
  • user data is dummy data, and only subcode information is used for system control purposes.
  • the lead-in area and the lead-out area are all formatted in the bucket structure shown in FIG.
  • the structure of the subcode Q channel is exactly the same as the structure shown in Fig. 8, but the lower 92 bits also include file management information for each session ⁇ session attribute information and the like.
  • the subcode Q channel of the lead-in area has four CONT ROL bits similar to those shown in FIG.
  • the method described in (A2) above can be applied as it is.
  • a CD-RW disc has a RAM area even partially, and the contents of the user data area are rewritable, it is desirable that the read-in area be rewritable. Since the PMA area temporarily stores file management information like the lead-in, it is desirable to use RAM data. Further, the trial writing area PCA must be in the RAM area by its nature.
  • information indicating that the CD-RW is a P-ROM is included in the lead-in area, where the drive first accesses to get information about the disc.
  • the file management information in the ROM area is also erased by a simple erasing operation described later to prevent the existence of the ROM area from being recognized.
  • the lead-in area exists on the inner side of the program area AC as shown by AB in FIG.
  • a read-in may exist in the program area AC in a multi-session format disc
  • the lead-in in the first session still exists on the inner side of the program area AC, and information relating to the entire disc is stored in the first area. It will be listed in the session lead-in.
  • the lead-in area of the first session will be simply referred to as the lead-in area, unless otherwise specified, including the case of a single session.
  • Special Information For unrecorded CD-RW discs, special information (Special Information) including disc attributes and recording conditions is described in the lead-in area by the AT IP having the data structure shown in Fig. 5.
  • the sub-type of the disk is the remaining 3 bits of the 1 byte (byte 22c in Fig. 5) that describes the frame information, excluding F1 among the 4 bits that represent the upper digit in BCD. (Indicated by XXX in Fig. 5). Eight provisions are possible, but are undecided at this time, and it is possible to assign a subtype of a CD-RW disc called a P-ROM disc in the future.
  • the information indicating the P-ROM is also recorded in the EFM data of the lead-in area.
  • the information indicating the P-ROM is also recorded in the EFM data of the lead-in area.
  • the subcode Q channel also has the data structure of FIG. 8 in the lead-in area, but the contents of the data described in the lead-in area are slightly different.
  • the AT IP Special Information (special information) 1 is used, the content is always recorded in a specific bit of the remaining 92 bits of the subcode Q channel shown in FIG. Is supposed to be.
  • Such recording such as copying the ATIP special information in the read-in area to the subcode of the EFM signal, has already been performed by a commercially available CD-RW recording / reproducing drive.
  • a commercially available CD-RW recording / reproducing drive When a P-ROM type CD-RW disc is used, the pre-pit is used to recognize that the recording drive is a P-ROM and not to destroy the file management information of the ROM data. If there is a master ROM area, it is preferable to record it on the disk using AT IP special information.
  • the data in the RAM area is given a recordable attribute only once using the AT IP, EFM subcode, and block attributes, and is used only for recording and playback.
  • the PROM it is preferable that information indicating the PROM is described in the lead-in area only by the EFM data.
  • the sub-type information of the Q channel disc of the above subcode may be recorded as an attribute P_ROM.
  • sub-codes in the program area to define data attributes for the purpose of the present invention has certain limitations in drive design, but in the lead-in area at the innermost circumference, the disk is In the multi-session format, it is preferable to use the sub-type to specify the attributes of each session and to specify the attributes for each session in the multi-session, and it can be used positively. .
  • Fig. 14 is a flow chart of attribute determination for each session in the case of multi-session, in which the attribute information of P-ROM is described in the lead-in, and in the case of multi-session, the write attribute for each session.
  • step Ml the disc is loaded into the recording / reproducing apparatus, and after reaching a predetermined number of revolutions, the focus and tracking servo of the recording / reproducing optical head are achieved, Can be reproduced. Usually, at this stage, it is recognized that the disc is not a CD, CD-ROM, or CD-R disc but a CD-RW disc based on information such as reflectance. Then, in step M2, the optical head accesses the lead-in area. Further, in step M3, the special information recorded in the lead-in area by the sub-code of the ATP information or the EFM signal is decoded, and the acquisition of the disc management information such as the disc type and the recommended recording conditions is started.
  • step M4 disc type information is obtained. Then, a part of the special information, more specifically, for example, from the special information 1 described above (see the description using FIG. 5), it is recognized that the disc is a PROM type and has a read-only area. Is done. Thus, in step M5, it is determined whether the disc is a multisession. Here, if the acquired information is a P-ROM and a multi-session, the lead-in of each session is sequentially accessed in Step M6 through Yes No rate, and in Step M7, the lead-in is performed. In step M8, the start and end addresses of the program area of each session (lead-out start address), the size of the session, and the If it is read-only or recorded, file management information is obtained. Normally, the information is obtained in order from the session arranged on the inner circumference side. In step M9, the flow passes through the No route until the last session is confirmed. Is repeated.
  • step M5 the program goes through the No route in step M5, and the file management information of the program area is obtained in step M10.
  • the step of storing the attribute information for each session of the disc type and the multi-session in the multi-session and then storing the attribute information in the temporary storage memory in the recording / reproducing apparatus is not specified.
  • Information ⁇ Attribute information for each session is also stored in the temporary storage memory each time, so that in subsequent operation of the recording / reproducing apparatus, it is not necessary to re-read the information from the disk every time. It is normal that there is.
  • a part of the management information is stored in the host computer connected to the recording / reproducing apparatus as well as the temporary storage memory in the recording / reproducing apparatus. And stored in the memory in the host computer. It is used for application programs installed on the host computer that use the recording and playback device.
  • step Ml1 the optical head accesses the PCA area in step Ml1 through the Yes route from step M9, and in step Ml2, acquires in step M3. Based on the disc management information thus obtained, test writing is performed to determine the optimum recording power.
  • step M13 a standby state is entered until a specific recording / reproduction command is issued.
  • Step Ml1 and step Ml2 may be performed immediately after step M3, respectively, or there is a specific instruction to start writing, and the process exits from the standby state step Ml3. It may be performed immediately before shifting to recording.
  • CD-RW there is a method of erasing RAM data called a simple erase operation.
  • the file management information which is RAM data in the lead-in area or PMA area, is erased or rewritten to meaningless data (repeated zeros).
  • This is an erasure method that makes the existence invisible.
  • the existence of a given file can be deleted without deleting the contents of the file.
  • the operation may be performed for each file or for each session, but if the information in the innermost lead-in area is deleted or rewritten on the disk, the disk appears to be a completely unrecorded new one. It has the convenience of being used as a disc.
  • the simple erase operation erroneously performs the ROM operation. It may erase the existence of the data file itself and make it inaccessible again. In particular, even though the contents of the file exist in the master ROM, there is a possibility that the file cannot be accessed, and the significance of providing the master ROM area is lost. Alternatively, data may be overwritten without recognizing the master ROM area as a ROM area.
  • a write-protected data attribute is added so that the ROM data is not directly overwritten and erased, and a measure for preventing the erasure of the ROM data due to a malfunction in the simple erase operation is also taken. It is preferred to apply.
  • FIG. 15 is a flowchart showing an example of a simple erasing method in a P-ROM.
  • the disc is a rewritable compact disc having a read-only area.
  • identification information that is described in advance as a pre-pit or groove deformation on the substrate and indicates that the recording medium is a rewritable type including a read-only area partially including a pre-pit row or groove deformation is recognized. (Recognition step).
  • step N3 attribute information is extracted and obtained from each of the lead-in areas in a plurality of sessions (extraction step), and in step N4, an attribute relating to rewritable or write (write) prohibition is obtained from the attribute information. Sex is determined.
  • step N4 the file management information (file structure) of the write-protection session is extracted in step N5 through the Yes route. , Acquired and transferred to the temporary storage memory (memory transfer step).
  • the file management information includes all information such as start and end addresses of the ROM session, addresses of files described in a program area in the session, and the like. Then, this step is repeated until the last session.
  • file management information is obtained in step N5 and stored in the temporary storage memory for each session. If the attribute determined in step N4 is not write-protection (playback only), the process proceeds to step N6 via the No route.
  • step N6 If it is confirmed in step N6 that the attribute confirmation has been completed up to the final session, the route goes through the Yes route, and in step N7, the lead-in area and the PMA area in the first (first) session are set. Access is made and all the file management information recorded in the area is erased (erase step). As a result, apparently, there is no file in the program area, whether it is read-only or rewritable, and the entire program area is recognized as unrecorded. If the session is not the final session, the process from step N3 is repeated through the No route of step N6.
  • step N8 the file management information (start Z end address, etc.) of the write-protected session transferred to the temporary storage device is re-registered in the lead-in area and the PMA area in the first (first) session. Then, in step N10, the head address of the rewritable area and the recordable capacity are updated (re-recording step), and the process ends (step N11).
  • step N2 If the disc is a normal CD-RW consisting of only a rewritable area, the process goes through the No route from step N2, and in step N9, as in step N7, all of the lead-in and PMA areas are read. The file management information is erased, and in step N10, all recordable areas are re-registered as newly rewritable.
  • step N1 to step N6 are executed in the first stage (see step Ml) when the disc is loaded into the recording / reproducing apparatus, as shown in FIG. Is obtained and stored in the temporary recording memory.
  • step Ml the steps from step N1 to step N6 are executed in the first stage (see step Ml) when the disc is loaded into the recording / reproducing apparatus, as shown in FIG. Is obtained and stored in the temporary recording memory.
  • steps Nl, N3 and N5 Information to be obtained may be obtained from the temporary storage memory.
  • the data erasing method for a rewritable phase-change recording medium of the present invention is directed to a recording medium in which a phase-change recording layer is provided on a substrate and an information recording area has a read-only area and a rewritable area. It is.
  • the data structures to be recorded in the program area can be broadly classified as follows: 660 format and UDF (universal 'disk. Format'). There are two types of fixed-length bucket recording formats specified in version 1.5.
  • the ISO 9660 format originally specifies the procedure for file management information of a read-only CD-ROM (yellow book), and is not so suitable for rewritable file management. In other words, it is assumed that a specific file exists on a fixed, continuous address on the disk, and is randomly accessible like a hard disk, and has a packet (data called a sector or cluster). It is unsuitable for the data structure recorded for each (the smallest unit of). However, it is a widely used format that can be played from a CD-ROM drive.
  • UDF version 1.5 and multi-read format are a subset of the international standard for file structure called ISO 13340, which is a US industry organization OSTA (Optical Storage Technology).
  • ISO 13340 which is a US industry organization OSTA (Optical Storage Technology).
  • OSTA Optical Storage Technology
  • the bucket structure shown in Fig. 10 is usually used as the structure of fixed-length packet recording.
  • This format defines the file management information on a disk as a particularly accessible CD-RW or equivalent virtual logical device, facilitates file management from the host computer, and ensures compatibility. It is specified for the purpose.
  • the program area is divided into two sessions according to the multi-session format, and the first session is a ROM area, the second session is a RAM area, or the first session is a RAM, and the second session is a ROM.
  • It is a medium that has a logical structure as an area.
  • the file management method in each session is all the same. It is desirable.
  • the current Orange Book states that if the file management method in each session is standardized in the ISO 9660 format or UDF format, it may be different between sessions. Different sessions can be viewed as virtually separate disks.
  • a P-ROM medium data of an application program is reproduced from a session which is a ROM as described later, a predetermined process is executed based on the program, and the result is immediately recorded in a session which is a RAM.
  • Such interactive use is assumed, and access for data reproduction / recording can be frequently performed between a session which is a ROM and a session which is a RAM.
  • One method is to write a device driver program that enables file management in UDF in the first session as ROM data in ISO 9660 format, and when the disc is loaded into a recording / reproducing device, the device It reads the driver and enables reading and writing of UDF format data, and is suitable for such usage.
  • the first session constitutes the ROM area and the second session constitutes the RAM area, and has the structure shown in Fig. 12 (a), with the ROM area in ISO 9660 format and the RAM area in UDF format. Therefore, it is used as a fixed-length packet recording area.
  • Fig. 12 (a) it is easier to follow the file management method of ISO 9660 format than to set the first session to ISO 9660. Because This is because ISO 9660 first obtains information on the logical address 16 located at the beginning of the program area. Normally, the first position of the logical address corresponds to one block length of the CD-ROM format.
  • the first session is a ROM area
  • the second session is a RAM area
  • the first session is written in ISO 9660 format
  • the second session is a UDF Written by Format (version 1.5).
  • a lead-in area and a lead-let area are provided for each session in accordance with the definition of the writing method using the multi-session method.
  • the start address of the unrecorded area after the second session which is the RAM area, is recorded in the PMA.
  • the first session that has been treated in this way is recognized as a closed session, and is recognized as a read-only area that cannot be rewritten according to the multi-session rules. Therefore, if the above-mentioned ROM data attribute is assigned to the data of the first session in AT IP frames, sub-codes or blocks, and if the first session is closed, double rewriting prohibition measures were taken on the system. This means that the reliability of ROM data destruction prevention is improved.
  • the following data recording method becomes possible. That is, usually, after accessing the data attribute information of the read-only area, a transfer step of transferring the program data recorded in the executable form to the read-only area to an external computer; Executing the program data to record the data in the rewritable area.
  • FIG. 16 is a flowchart showing an example of an operation for automatically executing ROM data.
  • a recording / reproducing device is connected to a host computer whose operating system is Windows (a product name of Microsoft Corporation), It is a flowchart for explaining such automatic execution operation.
  • step P 1 the standby state step Ml 3 after the flow up to step Ml 2 in FIG. 14 is executed is defined as step P 0 in FIG. 16.
  • step P 2 the file management information of the first session, which is a read-only area, There the c Wi nd ow s is obtained according to the procedure of I S09660, the root directory is searched in step P 2, a If there is a file with the name “autorun.inf”, the file is transferred to the host computer in step P3 via the Yes route, and the program specified in the file is automatically executed in step P4. Start up and execute (execution step). If autorun.inf points to another executable program file, and it is diverted, it transfers the specified file to the host computer and executes it.
  • step P5 The execution of the series of programs ends in step P5. Return to 0. If a file named autorun.inf does not exist in the root directory, the process returns to step Ml 3 in FIG. 14 and enters a standby state. If there is no file named autorun.inf in step P2, the process from step P0 is repeated through the No route.
  • the ISO 9660 format is important for maintaining compatibility with CD-ROM, the most widespread and most commonly shipped optical disk system shipped in computers. Especially in the case of a bootable program in which the data in the ROM area is automatically read into the host computer and executed, complete compatibility with the existing format is required.
  • device drivers that handle UDF formats (and programs that install them) which are not necessarily in widespread use, are recorded as ROM data in the IS09660 format accessible from ordinary CD-ROM device drivers. A usage method in which the program is read on a host computer and a UDF device driver is installed is also assumed.
  • the first session is a UDF format RAM area and the second session is an ISO 9660 format ROM area.
  • the use of giving the conditionally reproducible attribute to the data of the second session is particularly useful. That is, while the recording drive writes user data only to the RAM area of the first session, the user is not allowed to access the second session, and the user inputs specific encryption information or the like. It is used to read the ROM information of the second session. Therefore, there is provided an area that can be rewritten only by a desired user. Handling becomes easy.
  • all blocks in the read-in / read-out and program areas are user data blocks.
  • a link block, a run-in block, a user data block, and a run-out block are formed in the lead-in Z read-out and program area as shown in FIG. .
  • the program area is divided into two sessions according to the multi-session format rules, and the sessions that become the RAM area are grouped together and follow the UDF format. Since it can be used as a fixed-length packet recording area, convenience is improved.
  • Fig. 12 (c) is formatted to perform fixed-length bucket recording of UDF in a single session, and the ROM area and RAM area are switched via a link block as shown in Fig. 10. ing.
  • the layout in Fig. 12 (d) is a multi-session format consisting of two sessions, one for the ROM area and the other for the RAM area, both of which record fixed-length UDF packets as shown in Fig. 10. Format.
  • the ROM areas are arranged collectively on a series of consecutive addresses.
  • the ROM area is a group of files described based on, for example, A VDP (Anchor Volume Descriptor Pointer, which is located at the address 257 of the logical address) specified by the UDF. It is desirable to write management information data in RAM data and then arrange them collectively.
  • a VDP Anchor Volume Descriptor Pointer
  • the lead-in area may be re-writable if the RAM-type area is partially rewritten. desirable. Since the PMA area temporarily stores file management information like the lead-in, it is desirable that the PMA area be RAM data. However, if the lead-out area, especially the ROM data of the first session in FIG. 12 (a) consists of a series of pre-pits, it is desirable that the lead-out of the first session be formed of pre-pits.
  • both the ROM area and the RAM area are recorded by the EFM modulation signal, and the absolute time information by the subcode needs to be continuous without interruption.
  • the break between the ROM area and the RAM available area must correspond to the track or session break, which is the unit of data on the compact disk. For this data break, it is necessary to apply the 1 inking rule in the data appending part specified in the CD-RW standard (range book, part 3).
  • a logical ROM and a write-once type disk can be realized on the CD-RW disk 10, and the ROM data can be realized on a P-ROM disk partially having ROM data.
  • the mode 1 format is used is assumed, but other modes are also possible, and the difference between the modes does not affect the purpose of the present invention.
  • the six layers of the layer structure are merely examples, and are not limited to the six layers.
  • ADIP address-in-pregroove
  • This ADIP is an expression of an address not by time but simply by continuous integer values.
  • the recording drive device can use this to add data of the same content.
  • the pebbles may meander on the walls on both sides of the groove, or may meander on only one side.
  • the frequency and modulation method of each meander may be different.
  • wobbles may be realized by other periodic groove deformations.
  • variations in groove depth are not formed at about 1. 6 ⁇ ⁇ as CD format, Ru course applicable der to media having a higher density track pitch.
  • the basic data unit described in the pre-pit string and the recording data string due to the phase change includes the same as the user data like the sub-code Q channel of CD-RW format and the header information of CD-ROM format.
  • additional data such as address information is added as bit information
  • additional data information such as address information is described in advance in a meandering groove or a flat portion between grooves or between prepit rows.
  • additional data by groove meandering is performed in the case of the ATIP frame of the CD format described above.
  • the case is an example.
  • a deformed portion such as a concave / convex pit or a recording mark may be provided in a groove portion between adjacent grooves or a flat portion between adjacent prepit rows.
  • FIG. 20 shows a case where pit rows are provided between pre-pit rows and between grooves, and additional data including addresses is added.
  • the space between the grooves is called a land, but the flat part between the pre-pit rows can also be regarded as a land in a broad sense.
  • a part is provided to add addresses and additional data.
  • the additional data information including the address by the pit or the recording mark between the grooves has the same logical structure, and that the address be continuous in the read-only area and the recordable area. It is more desirable that not only user data but also these additional data have the same physical signal characteristics in the read-only area and the recordable area.
  • identification information indicating the disc or P-ROM, and address information of the ROM area in units of tracks or sessions are described in the sub-code Q channel of the lead-in. However, it may be described in the main channel in the lead-in area.
  • the address information of the ROM area is information (address or capacity) of at least one of the start address, end address, and capacity (data length) of each ROM area. Further, when each ROM area includes a plurality of user data files, file management information for managing the file structure (a directory structure, start / end addresses of each file, etc.) is added. Broad R
  • the main channel of a part of the address in the lead-in area is allocated to the description of the address information of the ROM area, and the pre-pit writes the address information of the ROM area in the main channel of the lead-in area.
  • the ROM data is not pre-pits but groove deformation modulated at a high frequency. May be.
  • the read-only area includes a first read-only area in which data is recorded by a pre-pit sequence and a second read-only area formed by writing and prohibiting rewriting of data. And a medium having a rewritable area.
  • the first read-only area is a master ROM area
  • the second read-only area is a post ROM area. That is, in the medium of the preferred embodiment, the three types of areas of the master ROM area, the post ROM area, and the RAM area are all provided on the same disk.
  • the content described below is a specific application example of a medium having such three types of areas.
  • the main routine is a program that launches a menu screen as a user interface and executes various processes according to the user's selection.
  • the main routine program executes various processes according to the user's selection.
  • the user selects a specific demonstration according to the menu screen, the selected data is obtained from the demonstration data collection, and the demonstration is executed by the main routine program.
  • user data such as the user repeating the song based on the demonstration is recorded in the RAM area.
  • the main routine program is stored in the master ROM area, and the demonstration data collection is stored in the post ROM area so that it can be customized so that each user can have different contents.
  • the user data is recorded in the RAM area.
  • Fig. 17 is a diagram showing an example of the P-ROM data arrangement.
  • the P-ROM medium shown in Fig. 17 has a predetermined area in the innermost continuous area of the program area AC shown in Fig. 4 (a).
  • An application program area in which data of the application program is stored is formed as a first session having a ROM attribute, and a user data recording area capable of recording at least user data relating to the application program in the remaining area has a different RAM attribute. Is set as the second session with
  • the ROM attribute session including the application program (the program area 150 of the first session) is composed of both the master ROM area 152 and the post ROM area 153. Sessions with this ROM attribute (master ROM area 152 and boost ROM area 153) are closed by the first session lead-in area 141 and the first session lead-word area 160, and have the RAM attribute.
  • the session (RAM session) is closed in the second session lead-in area 1442 and the second session lead-in area 161.
  • Both the first session and the second session have the bucket structure of FIG. 10 according to the UDF specification, and the second session including the RAM area 154 has the block structure of FIG. 10 in advance according to the UDF specification. Is recorded and formatted by RAM data.
  • the attributes of the entire first session including the application program are set to the write-protected (reproduction only) attribute, and the first session program area 150 has a master ROM area consisting of a pre-pit row, and an unrecorded recording area ( (Only the guide groove is present). Master The end of the ROM area 152 and the start of the cost ROM area 1553 are connected via a link block 25a shown in FIG.
  • a read-only or rewritable attribute for each session and to specify a data attribute for each ATP frame, EFM frame, or block.
  • a write-protected (playback-only) attribute is assigned to the master ROM area 152 composed of pre-pit rows, and a rewritable attribute is assigned only once (only the first time) to a rewritable unrecorded area.
  • the pre-pit rows in the master ROM area 152 and the grooves in the post ROM area 1553 meander, and the data attribute is given by ATIP.
  • Each record of master ROM data and post ROM data shall be recorded only at the site or the software creator, and after being distributed to the user, the attribute of the first session will be recorded at the user side. Recognized as a write protected (playback only) session based on regulations.
  • the prepit row having a meandering center line is switched to a groove meandering, and the address based on ATIP information is continuously provided. ing.
  • the demonstration data is executed based on the menu screen for the user interface in Fig. 17 and the selection from the menu screen.
  • Basic routines (execution programs) 155 are stored in the master ROM area 152. Such a basic routine does not depend on the type of foreign language to be learned, that is, does not depend on the intended user, so it is formed as a master ROM.
  • the display of the main routine is the native language of the learner, for example, Japanese.
  • the demonstration data is equivalent to the pronunciation of a phrase serving as a model, and is stored in the boost ROM area 1553 as a demonstration data set 1556.
  • the demonstration data will have different contents for different languages. It is recorded in the BOST ROM area 153 on the factory or software creator side.
  • the content consists of multiple phrases, each with a separate demo 1 data 1, Data 2 of demo 2 ⁇ ⁇ ⁇ ⁇ Data n of demo n is arranged so that data of any demo number can be directly accessed according to the menu screen selection.
  • the data obtained by the user repeating the demonstration phrases are digitized by AD conversion.These data become the demo data 1 for demo 1, the demo data 2 for demo 2, ..., and the demo data n for demo n.
  • Table of user data (repetition data of demonstration) 1557 is stored in RAM area 154.
  • the recording / reproducing apparatus of the present invention includes an application program area in which data of a predetermined application program is stored in a continuous area on the inner circumference or outer circumference side of the program area.
  • a user data recording area that can record at least user data related to the application program in the remaining area of the continuous area that is formed as a session (playback-only area) having a dedicated attribute).
  • This is a recording / reproducing apparatus that sets as another session (rewritable area) having a “possible attribute” and reproduces the application and records and reproduces user data related to the application.
  • the proposed recording / reproducing apparatus of the present invention is loaded with the disk-shaped medium and recognizes that it is a P-ROM (rewritable type phase-change optical disk having a read-only area partially).
  • Recognizing means a program executing means capable of accessing the ROM session recognized by the recognizing means, acquiring application program data and executing the program contents, and an application executed by the program executing means
  • Information input means for inputting required information according to a program
  • recording means for accessing the user data recording area and recording the information input by the information input means as user data. It is configured with.
  • FIG. 18 is a flowchart for explaining a P-ROM recording / reproducing method. This flowchart is realized using, for example, the recording / reproducing system shown in FIG.
  • FIG. 19 is a block diagram of a recording / reproducing system according to an embodiment of the present invention.
  • the host computer 230 also includes an interface for exchanging input and output with the user.
  • the recording / reproducing device 220 and the host computer 230 are connected by a data transfer path 240 so that data can be transferred to each other.
  • the application program is decrypted and executed by the CPU 250 of the host computer 230.
  • the temporary storage memory 260 is a solid-state memory or a hard disk, and is used as a work space during program execution.
  • step S1 the P-ROM disk of the present invention is mounted.
  • step S2 disc management information is read in each of the lead-in area, the PMA area, and the PCA area.
  • the disc management information along with information on the optimum recording pattern and linear velocity at the time of recording, determines that the disc type is CD-RW and that the disc is a P-ROM type disc.
  • step S3 it is determined that the disk is a multi-session in the lead-in area and the PMA area. Then, the file information of the program area of the second session, which is the ROM session, is obtained.
  • Steps S1 to S3 are executed in the CD-RW recording / reproducing device 220. Further, in steps Sl, S2, and S3, a flow as shown in the flowchart of FIG. 15 is executed in more detail.
  • step S4 of FIG. 18 the data of the main routine of the application program in the master ROM area 152 on the CD-RW disk 210 is read into the host computer 230, and the subsequent steps are performed by the host computer.
  • the program is executed by the CPU 230 of the computer 230 while exchanging data with the recording / reproducing device 220.
  • step S5 a menu screen, which is a user interface, is started, and the user is caused to select an operation of the subsequent execution program.
  • step S6 the execution of the demonstration and the contents of the demonstration to be executed are selected, and the start of the demonstration is instructed. Is shown.
  • the first demonstration selected is called Demo 1.
  • step S7 a predetermined address of the post ROM area 1553 of the CD-RW disc 210 on which the specific contents of the demonstration are described is accessed, and the data of the demo 1 is obtained. Normally, this data is temporarily stored in a temporary storage memory such as a solid-state buffer memory or a hard disk in the host computer, and is read out from the temporary storage memory 260. It is converted to an image and executed as a demonstration.
  • a temporary storage memory such as a solid-state buffer memory or a hard disk in the host computer
  • step S9 the demonstration is repeatedly performed by the route R1, and the process shifts to the data input from the user.
  • step S10 the RAM area of the CD-RW disc 210 is accessed and the apparatus enters a standby state.
  • step S11 data is input from the user. This is equivalent to the user repeating the contents of Demo 1 using language learning as an example.
  • the audio data is AD-converted in the host computer 230 and is temporarily stored in a temporary storage memory 260 in the host computer 230.
  • the user data and the demo 1 data may be assigned to the left and right channels, respectively, and combined to form a stereo recording. This makes it easier to compare the content of Demo 1 with the content of the user's repetition.
  • step S12 the data is transferred to the recording / reproducing device 220, and the user data is recorded in the RAM area of the CD-RW disc 210, and in step S13, as necessary.
  • the user's input data is played immediately.
  • a route R2 for re-entering user data or a route R3 for returning to the repetitive execution of the demo 1 can be selected, but if it is not necessary, the step S1 Next demonstration at 5 (Demo 2) You will be given a choice to move to or end the demonstration. To proceed to the next demonstration, the process returns to step S6 via route R4 (Yes route), and a demo selection operation is performed.
  • step S16 the file management information is updated based on the user data newly recorded in the RAM area, and in step S17, the demonstration ends, Return to the menu screen by route R5.
  • the CD-RW having three types of areas of the master ROM, the post ROM, and the RAM according to the present invention stores an application program of the first version in the master ROM area in addition to the specific example such as the language learning described above.
  • a partial version upgrade update
  • the first version of the application program can be a basic program that does not need to be updated and is common to all applications added later as a post ROM.
  • the master ROM, the post ROM, and the RAM are respectively arranged in order from the inner periphery, but the order is not necessarily required. Further, as shown in FIG. 12C, the master ROM, the post ROM, and the RAM area may be arranged in the UDF format that is not divided into sessions. Industrial applicability
  • a rewritable phase-change disk in particular, in a CD-RW, three types of data attributes of write-protection (reproduction only), rewritable once, and rewritable arbitrarily are set in the CD format. It can be specified for each frame of 1 / ⁇ 5 seconds, which is the basic unit of data, or for each block of user data. As a result, originally rewritable data can be handled as logical ROM data. Also, the CD-RW can be used as a write-once medium as it appears.
  • a physical ROM area consisting of pre-pits, or the above-mentioned logical ROM area and RAM area are mixed, and both areas are covered with the same phase change medium.
  • overwriting of ROM data can be prohibited, and destruction and falsification of ROM data and data can be prevented.

Abstract

L'invention se rapporte à un support d'enregistrement optique comportant une couche d'enregistrement à changement de phase sur un substrat et ayant une région non inscriptible et une région inscriptible dans une région d'enregistrement des données. Dans la région non inscriptible et dans la région inscriptible, des données de base ayant une structure de couche et une structure logique identiques sont enregistrées. Les données de base incluent un code supplémentaire permettant d'identifier, pour chaque unité de données, les données ne pouvant faire l'objet que d'un accès en lecture ou les données pouvant faire l'objet d'un accès en écriture, ce qui permet de produire un support d'enregistrement optique sur lequel sont enregistrées des données ne pouvant faire l'objet que d'un accès en lecture et ne pouvant subir ni destruction ni modification.
PCT/JP2000/009016 1999-04-05 2000-12-20 Disque optique reinscriptible a changement de phase dote partiellement d'une region rom et procedes d'enregistrement et d'effacement de donnees pour disques optiques WO2001048753A1 (fr)

Priority Applications (6)

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AU22212/01A AU2221201A (en) 1999-12-28 2000-12-20 Rewritable phase change optical disk partly having rom region and data recordingand erasing methods for optical disk
EP00985792A EP1168322A4 (fr) 1999-12-28 2000-12-20 Disque optique reinscriptible a changement de phase dote partiellement d'une region rom et procedes d'enregistrement et d'effacement de donnees pour disques optiques
US09/942,277 US6671249B2 (en) 1999-12-28 2001-08-27 Optical recording medium, data recording method for rewritable-type phase change type optical disc, data erase method for rewritable compact disc, data erase method for rewritable phase change type recording medium, read only data erase method, and recording/readout apparatus
US09/952,509 US20020019948A1 (en) 1999-04-05 2001-09-12 Method and apparatus for preventing unauthorized intrusions into transmission apparatus maintenance system
US10/686,760 US7092335B2 (en) 1999-12-28 2003-10-15 Data recording or erasing method for an optical recording medium
US11/397,188 US7664000B2 (en) 1999-12-28 2006-04-04 Data erase method for rewritable phase change type recording medium

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Application Number Priority Date Filing Date Title
JP11/374645 1999-12-28
JP37464599 1999-12-28
JP2000/67051 2000-03-10
JP2000067051 2000-03-10

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US09/942,277 Continuation US6671249B2 (en) 1999-12-28 2001-08-27 Optical recording medium, data recording method for rewritable-type phase change type optical disc, data erase method for rewritable compact disc, data erase method for rewritable phase change type recording medium, read only data erase method, and recording/readout apparatus
US09/952,509 Continuation US20020019948A1 (en) 1999-04-05 2001-09-12 Method and apparatus for preventing unauthorized intrusions into transmission apparatus maintenance system

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US7092335B2 (en) 2006-08-15
US20050078577A1 (en) 2005-04-14
EP1168322A1 (fr) 2002-01-02
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US7664000B2 (en) 2010-02-16
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